Sakr, A., Khalil, G., Ahmed, H. (2024). THE ANTIOXIDANT ACTIVITY AND CHEMICAL PROPERTIES OF THREE ESSENTIAL OILS THAT ARE GROWN IN EGYPT. Menoufia Journal of Agricultural Biotechnology, 9(6), 95-107. doi: 10.21608/mjab.2024.294157.1019
abdelaziz A Sakr; Gaber A Khalil; Hend Ali Ahmed. "THE ANTIOXIDANT ACTIVITY AND CHEMICAL PROPERTIES OF THREE ESSENTIAL OILS THAT ARE GROWN IN EGYPT". Menoufia Journal of Agricultural Biotechnology, 9, 6, 2024, 95-107. doi: 10.21608/mjab.2024.294157.1019
Sakr, A., Khalil, G., Ahmed, H. (2024). 'THE ANTIOXIDANT ACTIVITY AND CHEMICAL PROPERTIES OF THREE ESSENTIAL OILS THAT ARE GROWN IN EGYPT', Menoufia Journal of Agricultural Biotechnology, 9(6), pp. 95-107. doi: 10.21608/mjab.2024.294157.1019
Sakr, A., Khalil, G., Ahmed, H. THE ANTIOXIDANT ACTIVITY AND CHEMICAL PROPERTIES OF THREE ESSENTIAL OILS THAT ARE GROWN IN EGYPT. Menoufia Journal of Agricultural Biotechnology, 2024; 9(6): 95-107. doi: 10.21608/mjab.2024.294157.1019
THE ANTIOXIDANT ACTIVITY AND CHEMICAL PROPERTIES OF THREE ESSENTIAL OILS THAT ARE GROWN IN EGYPT
1Agricultural Biochemistry, Faculty of Agriculture, Menoufia University
2Agriultural Analytical Chemistry, Menoufia University
Abstract
: Numerous essential oils are widely recognized for their capacity to act as antioxidants. The three essential oils of clove, thyme, and marjoram were assessed for their physical (soluble in 80% ethanol, specific gravity, refractive index, and optical rotation) and chemical (acid number, saponification number, and ester number) qualities in the current study. The gas chromatography/ mass spectrum (GC/MS) method was utilized to ascertain the compositions of the essential oils, and the DPPH (2,2-diphenyl-1 picrylhydrazyl) free radical scavenging and reduction power tests were used to assess the antioxidant activity of the oils. The solubility of the oils of clove, thyme, and marjoram in 80% ethylene was found to be 1:1.5, 1:1.5, and 1:1.7, respectively, while specific gravity intensity was 1.08, 0.97 and 0.97 respectively, refractive index was 1.53, 1.53 and 1.50, respectively and optical rotation was -1.9, +5.47 and +6.01 respectively. On the other hand, chemical properties of clove, thyme and marjoram oils showed that; saponification number was 198.17, 195.32and 199.21(mg KOH/g oil), respectively, while acid number was 11.39, 11.83 and 12.03 (mg KOH/g oil), respectively, and ester number was 186.78, 183.49and 187.18 (mg KOH/g oil) respectively. Major identified components were benzene-methanol 50.74 % for clove essential oil, o-cymene 42.0% for thyme essential oil and 3-cyclohexen-1-o1 23.32% for marjoram essential oil. The three essential oils clove, thyme and marjoram showed an IC50 of 17.74%, 15.67% and 14.63% respectively for in the DPPH assay.
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